3 years ago

The sum of three times a number and 10 is 31.Find the number.

Mathematics

1 answer:

olga55 [171]3 years ago

4 0

Answer:

Step-by-step explanation:

Let the number be n.

$3n+10=31$

Subtract 10 from both sides:

$3n+10-10=31-10$

$3n=21$

Divide both sides by 3:

$\frac{3n}{3}=\frac{21}{3}$

$n=7$

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